diff --git a/public/css/theme-arc-red.css b/public/css/theme-arc-red.css
index 4475eaa..cc8011b 100644
--- a/public/css/theme-arc-red.css
+++ b/public/css/theme-arc-red.css
@@ -1,6 +1,7 @@
-/* source: https://github.com/go-gitea/gitea/blob/main/web_src/less/themes/theme-arc-green.less */
+/* root and emoji source: https://github.com/go-gitea/gitea/blob/main/web_src/less/themes/theme-arc-green.less */
+/* some root colors and one alpha are customized */
 /* custom colors are slightly brighter */
-/* custom alpha is slightly lower */
+/* custom alpha is slightly more transparent */
 
 :root {
     --is-dark-theme: true;
diff --git a/public/css/theme-auto-red.css b/public/css/theme-auto-red.css
index 1c0de41..902be1d 100644
--- a/public/css/theme-auto-red.css
+++ b/public/css/theme-auto-red.css
@@ -102,9 +102,10 @@
 }
 
 @media (prefers-color-scheme: dark) {
-    /* source: https://github.com/go-gitea/gitea/blob/main/web_src/less/themes/theme-arc-green.less */
+    /* root and emoji source: https://github.com/go-gitea/gitea/blob/main/web_src/less/themes/theme-arc-green.less */
+    /* some root colors and one alpha are customized */
     /* custom colors are slightly brighter */
-    /* custom alpha is slightly lower */
+    /* custom alpha is slightly more transparent */
 
     :root {
         --is-dark-theme: true;